15 episode serial where Jack Armstrong, the All-American Boy, battles the evil Dr. Grood, who has placed a death ray aboard his spaceship orbiting Earth.
as Jack Armstrong
as Betty Fairfield
as Princess Alura [Chs. 3-6, 9-11, 15]
as Billy Fairfield (as Joe Brown)
as Uncle Jim Fairfield
as Prof. Hobart Zorn
as Henchman Blair
as Henchman Slade
as Vic Hardy
